fix: update stream_chat/base/channel.py

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: totalimmersion

stream_chat/base/channel.py

@@ -475,7 +475,9 @@ def unarchive(
         pass
 
     @abc.abstractmethod
-    def update_member_partial(self, user_id: str, to_set: Dict = None, to_unset: Iterable[str] = None) -> Union[StreamResponse, Awaitable[StreamResponse]]:
+    def update_member_partial(
+        self, user_id: str, to_set: Dict = None, to_unset: Iterable[str] = None
+    ) -> Union[StreamResponse, Awaitable[StreamResponse]]:
         """
         Update channel member partially